Add a cancel / redo button

[Jeikko]

For example, if the narrator starts an action aimed at the wrong tags, it would make it easier to cancel and perform the intended action instead

[uurshin]

Great idea ! We could save the last state of the targeted characters before triggering an action (challenge, pick, poll, etc.), and rollback to these states if the host clicks on the cancel button. The cancel button will disappear if another action is triggered, to prevent from overriding states.